A flexible pressure sensor based on biomaterial sunflower flower pollen and titanium carbide composite material and its preparation method

A pressure sensor, biomaterial technology, applied in the direction of instrumentation, force measurement, force/torque/power measuring instrument calibration/testing, etc., can solve a wide range of applications, unsatisfactory response time and sensitivity performance, poor conductivity Ability and other issues, achieve low detection limit, easy to operate the production process, improve the effect of detection limit

Active Publication Date: 2021-02-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although natural biomaterials can effectively improve the performance of devices, their poor electrical conductivity limits their wide application.
Usually, people compound carbon materials with good conductivity and natural biomaterials to improve their conductivity. Although this method is simple to manufacture, the flexibility, response time and sensitivity of the device are not satisfactory.

Method used

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  • A flexible pressure sensor based on biomaterial sunflower flower pollen and titanium carbide composite material and its preparation method
  • A flexible pressure sensor based on biomaterial sunflower flower pollen and titanium carbide composite material and its preparation method
  • A flexible pressure sensor based on biomaterial sunflower flower pollen and titanium carbide composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Purchase commercial polyethylene diformate (PI) with a thickness of 80 μm and polydimethylsiloxane (PDMS) flexible materials with a thickness of 80 μm, ultrasonically clean them with acetone, ethanol, and water for 10 minutes, and dry Dry to obtain a flexible substrate, respectively as an upper flexible substrate and a lower flexible substrate;

[0035] (2) Preparation of titanium carbide solution: Add 2.4g of lithium fluoride (LiF) into 30mL of 9M hydrochloric acid (HCl) solution and stir for 5min, then mix 1.5g of titanium aluminum carbon (Ti 3 AlC 2) was slowly added to the above solution, then transferred to a polytetrafluoroethylene reactor, stirred and heated in an oil bath at 30°C for 48 hours, and after taking it out, added a sulfuric acid solution with a concentration of 2M and a volume of 10mL, and then centrifuged at 3500rpm for 5min. After removing the supernatant, add 10 mL of deionized water, centrifuge and wash at 3500 rpm until the pH is 6, collect ...

Embodiment 2

[0042] (1) Purchase commercial polyethylene terephthalate (PET) with a thickness of 60 μm and polydimethylsiloxane (PDMS) flexible substrate film with a thickness of 80 μm, and use acetone, ethanol, and water to ultrasonically Wash for 10 minutes and dry to obtain flexible substrates, which are respectively used as upper flexible substrate and lower flexible substrate;

[0043] (2) Preparation of titanium carbide solution: 2.4g of lithium fluoride (LiF) was added to 30mL of 9M hydrochloric acid (HCl) solution and stirred for 5min, and 1.5g of titanium aluminum carbon (Ti 3 AlC 2 ) was slowly added to the above solution, then transferred to a polytetrafluoroethylene reaction kettle, stirred and heated in an oil bath at 30°C for 48 hours, after taking it out, added a sulfuric acid solution with a concentration of 2M and a volume of 10mL, and then centrifuged at 3500rpm for 5min to remove Add 10 mL of deionized water after the supernatant, and centrifuge at 3500 rpm until the pH...

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Abstract

The invention belongs to the technical field of flexible pressure sensors, and in particular relates to a flexible pressure sensor based on biological materials sunflower flower pollen and titanium carbide composite materials and a preparation method thereof. The device produced by the method is sequentially composed of a lower flexible substrate, a lower metal electrode, a 20-40 μm thick sunflower pollen / titanium carbide composite film sensing layer, an upper metal electrode and an upper flexible substrate. External force applied to the device of the present invention will cause the sensing layer to deform and reduce its thickness, thereby reducing the resistance of the material and increasing the corresponding output current signal. Compared with the traditional pressure sensor, the pressure sensor prepared by the present invention not only has good flexibility, high stability, high sensitivity and faster response recovery time, but also has biocompatibility, and can make sensors on a large scale and in a large area Array, suitable for wearable electronic skin, medical health and intelligent robots and other fields.

Description

technical field [0001] The invention belongs to the technical field of flexible pressure sensors, and in particular relates to a flexible pressure sensor based on biological materials sunflower flower pollen and titanium carbide composite materials and a preparation method thereof. Background technique [0002] In recent years, flexible and wearable pressure sensors have attracted extensive attention due to their excellent properties such as portability and good biocompatibility. The development and design of flexible pressure sensors are of great significance to electronic skin, disease diagnosis, medical care and other aspects. Generally speaking, the performance of flexible pressure sensors is mainly evaluated by the three indicators of detection limit, sensitivity and flexibility, and the material or structure of the sensing layer is an important factor affecting these three indicators. In order to improve the performance of flexible pressure sensors, people have tried ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/22G01L25/00
CPCG01L1/22G01L25/00
Inventor 王丽丽王康王冬宜
Owner JILIN UNIV
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